Politics and Business magazines
- Southern Electric PLC
- Southern Financial Bancorp, Inc.
- Southern Indiana Gas and Electric Company
- Southern New England Telecommunications Corporation
- Southern Pacific Transportation Company
- Southern Peru Copper Corporation
- Southern Poverty Law Center, Inc.
- Southern States Cooperative Incorporated
- Southern Union Company
- Southern Wine and Spirits of America, Inc.
- Southtrust Corporation
- Southwest Gas Corporation
- Southwest Water Company
- Southwestern Bell Corporation
- Southwestern Electric Power Co.
- Southwestern Public Service Company
- Souza Cruz S.A.
- Sovran Self Storage, Inc.
- Spacehab, Inc.
- Spacelabs Medical, Inc.